Rotary steam-engine.



J. G. MATHIESEN, DEO'D.

r. n, MATHIBSBN, ADMINISTRATMX ROTARY STEAM ENGINE.

APPLIoATloN FILED SEPT. 9, 1912,

Patented Aug. u, 1914,

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. @lido www C MTHLESEN. DECnAiSED, Lern or OAKLAND, Catrroenre. er maisons 'a apiantiszraara, or can, neuronale.. assieme. or onno'doraUs ananas? SM FRANCISCO, catrroaala.

morena eresia-Externa.

masses Specification of Letters Patent,

,Patented Aug. 111, 1914i..

application aiea september a, w32. anni no. risata..

To all whom it may concern:

Be it known that .llantas C. MaTHInsEN, dei`-czised,to rnieily a citizen ot the United States residing at Oakland, in the county of Alameda and State ot California, did inventa new and useful llmprovement in it@ tary Steam-Engines, of which the following is a specification.

This invention relates to improvements in steam engines and particularly appertains to certain novel'v and usefull improvements in rotary engines.

The object of this invention 1s to provide a simple. substantial and ellicient form ofi'otary engine in which steam reacts against a comparatively large number of piston varies, and which in the course of its travel passes from the interior of the rotor to the exterior thereof, reacting both directly and expansively on the vanes and finally exhausting into .the exterior portion of the engine. y

The invention consists of the parts and combination and construction of parts as hereinafter more fully described -and claimed, having reference to the accompany ingy drawings', in which- ["igiireffl"4 is a cross lsection showing the relation of the valves, varies and rotor. Fig. 2 is a longitudinal cross section partly broken away on line X X.

In the drawings A indicates a stationary casing in which is mounted a series of revoluble piston valves 2 and a rotary piston 3. The rotary piston is revolubly mounted upon a stationary member .4 forming art of the end cover or casing' 5 through w ich live steam is admitted to drive the piston 3 through a pipe (i. 'llhe stationary member ,4 is provided with an annular port or passage 4 through which the steam passes, and is 'also provided with a number of radial ports 7 through which the steam discharges.

.The rotary piston 3 is also provided with a 4 will register with the radial porti` 7 a part ton will be the same. The valves are provided with segmental pockets or recesses 12 which are so positioned with relation to the abutments or vanes 9 on the piston that these will register and allow the venes to pass the valves.

Ln operation live steam is admitted into the annular chamber of the stationary member 4 and discharges through the radial ports 7. The live steam is admitted into the piston chambers 15 toi-med between the valves and the piston vanes during the period that the radial ports 7 and 8 register. l'lowever, as the piston rotates the ports 8 will gradually be brought out of register and the admission of live steam cut od', the cnt ott' position being shown in dotted lines at 16. The remainder of the stroke is acted on by the expansive force of the steam. The position of the. next valve `Will then be such that the piston vane 9 and the segmental pocket in the piston valve Will register to permit the vane to pass into the next pres sure chamber, where it is aga-in. acted on by livrl steam, and the radial ports 8 will again register with the ports 7. All exhaust steam is discharged through the exhaust ports 17, being forced out through the ports by the forward faces of the varies 9.

lu order to prevent leakage ot steam by or'around the valves or piston, these are shown as provided with packing rings 19.

lhe drawings here illustrate an engine having four separate pressure chambers and connected valves.. lt will be understood that any number may be arranged when it is desired to increase the size or power ot the engine.

rl`he engine is simple Vand substantial in construction and reliable in its actions. The materials and finish ot the several parte` of the engine are such as the experience and judgment ot the manufacturer may dictate.

llt is to be understood that various changes in torni. proportions and minor details oit construction may be resorted to within the tit) Miti

scope of the appended claim, and that Vthe invention is not to be limited to the specific` design and construction here shown. Y,

Having thus described the invention, what is claimed and desired to be secured by Letters Patent is In a rotary engine of the character described, a `casing composed of outer and inner shells with intermediate channels divided into sections, a port from each section comxnunicatingwith the interior of the casing, valve chambers between each section of the channel, rotatable valves with radial grooves, a piston with a plurality of fixed radial vanes corresponding in number to the rotatable valves registering and passing through the valve groov during rotation, spring. ressed packing carried by each vane, a lead fitting the end of the casing, and a central drum formed integral with and .projecting inwardly therefrom and forming av bearing for the piston cylinder, said drum having a. continuous opening therethrough for a shaft andan annular Ichannel `and an exterior communicating passage to admit steam, radial ports in the drum and corresponding ports in the piston cylindex' registering intermittently and communicating with the' space traversed by the Yanes, so as to impel the vanes between the valves and exhaust the spent steam into the spaces between the casing shells.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

FRANCES E. MATHIESEN, rhhm'm'stratriw of the estate of James C.

Mathesen.

Witnesses:

WM. H. Banken,

W. P. W. ALBEE. 

